It sounds like you're asking about Vo Sab powder, which isn't a commonly known medical or pharmaceutical term.

Here’s what you should know:

• Unrecognized term: Vo Sab powder may be a brand name, traditional remedy, or a product specific to a certain culture or region.
• Check ingredients: It’s important to know what it contains to evaluate safety.
• Consult a specialist: Before using any unfamiliar powder or supplement, especially for health reasons, please talk to a doctor.
• Be cautious: Some powders marketed as health supplements may lack scientific evidence supporting their claims.

If you can share more details about where you heard about Vo Sab powder or what it’s used for, I can help provide clearer guidance.

For any health concerns or before starting new treatments, consulting a doctor is always the safest approach.